linux-kernel - Re: [PATCH] Fix printing when no interrupt is allocated

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Date:	Wed, 31 Oct 2012 17:03:00 +0800
From:	Daniel J Blueman <daniel@...ascale-asia.com>
To:	Len Brown <lenb@...nel.org>
CC:	Joe Perches <joe@...ches.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix printing when no interrupt is allocated

Hi Len,

On 19/10/2012 09:21, Joe Perches wrote:
> On Fri, 2012-10-19 at 08:33 +0800, Daniel J Blueman wrote:
>> Previously a new line is implicitly added in the no GSI case:
>>
>> [    7.185182] pci 0001:00:12.0: can't derive routing for PCI INT A
>> [    7.191352] pci 0001:00:12.0: PCI INT A: no GSI
>> [    7.195956]  - using ISA IRQ 10
>>
>> The code thus prints a blank line where no legacy IRQ is available:
>>
>> [    1.650124] pci 0000:00:14.0: can't derive routing for PCI INT A
>> [    1.650126] pci 0000:00:14.0: PCI INT A: no GSI
>> [    1.650126]
>> [    1.650180] pci 0000:00:14.0: can't derive routing for PCI INT A
>>
>> Fix this by making the newline explicit and removing the superfluous
>> one.
>
> I think this is a better fix:
>
>   drivers/acpi/pci_irq.c | 11 ++++++-----
>   1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
> index 0eefa12..9b98f9f 100644
> --- a/drivers/acpi/pci_irq.c
> +++ b/drivers/acpi/pci_irq.c
> @@ -459,19 +459,20 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
>   	 */
>   	if (gsi < 0) {
>   		u32 dev_gsi;
> -		dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
>   		/* Interrupt Line values above 0xF are forbidden */
>   		if (dev->irq > 0 && (dev->irq <= 0xF) &&
>   		    (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) {
> -			printk(" - using ISA IRQ %d\n", dev->irq);
> +			dev_warn(&dev->dev,
> +				 "PCI INT %c: no GSI - using ISA IRQ %d\n",
> +				 pin_name(pin), dev->irq);
>   			acpi_register_gsi(&dev->dev, dev_gsi,
>   					  ACPI_LEVEL_SENSITIVE,
>   					  ACPI_ACTIVE_LOW);
> -			return 0;
>   		} else {
> -			printk("\n");
> -			return 0;
> +			dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
> +				 pin_name(pin));
>   		}
> +		return 0;
>   	}
>
>   	rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);

We're still seeing this in 3.7-rc3. Any preference to the approach here?

Thanks,
   Daniel
-- 
Daniel J Blueman
Principal Software Engineer, Numascale Asia
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